Control means for sound-reproducing machines



F. CHENEY. CONTROL MEANSFORSOUND REPRODUCINAG MACHINES. APPLICATIONFILED IIQII.I4, 1911.

1,415,525, Y Patented May 9, 1.922.

AT l

FOREST CHENEY, OFOHIOAGO, ILLINOIS, AssIGNOB. 'ro lCHENEY TALKINGiviACIIINII COMPANY, or CHICAGO, ILLINOIS, A OONPORATIONOF ILLINOIs;

CONTROL MEANS non SOUND-REPROIJCING-MACHINES.

To all 'whom z't may cam/cera.

Be it known that 'I, Fonnsr CHENEY, a lcitizen of the United-"States,and resident of Chicago, inthe county of kCool; and State Vof Illinois,have invented certain new and useful Improvements in Control Means'. forVSound-Reproducing Machines, of which the renewing is a specificationThis invention relates" tov sound repro-` du'cing'y machines, and' morev-particu:larly to -control' means therefer. Y ,i

` v@ne of-theobjects' of the invention is to 'control the operation ofasoundfreprodueing machine-in an improved manner. i v ',An'othe'robjectof theinvention V1s to y1mpio've means for automatically stoppingthe Operation 'ofl a sound :reproducing machine.`

Anotherrobject'isto provide control means for sound reproducing machinesadapted to meetthevarious requirements for successful use. f i

c 'Generally speaking, these and Y other 'objects are accomplished byproviding ina 'sound reproducing machine, vthecombina'- tion of a turntable, a motor for actuating siaid" turn table, and means 'fo'rinterrupting the actuating `medium for said motor for causing theturntable to stop.

' Theinvention is illustrated on vthe accompanying sheetof drawings inwhich, 'L

Figure 1 isa side elevation, partly in s ection, of a portion of'thesound reproducing machine embodying my invention; l

Figure 2 is a sectional view't'aken in the vplanefof line Q-Qof yFigure'ii-Shpwng,

among, other things, the motor circuit com- 'p'lete for driving theturntable; e

L'Fi'gur'e 3 is a fragmentary sectional view f 'of thesam'e showingthe'motor circuit inten 'Yitwill benoted'th'at I have show'n a tonearm''and a Vturn table `6 of a `sound reproducing machine, The tone arm5 is `provided with a downwardly extending vcylinl`dricalportion 7'adapted to rotate-within the Application flied November 14,l 1917.serial No. 201,921.

'or A lever 26.

tubular portion 8 'attached to; the base y95.61?

the machine'. Around this tubularj portion specification of LettersPatent. "Patentf-dy May 8 is rotatably arranged asleeye[10whicliis iconnected to the cylindrical-portion? ofthe `tone arm by-pinsfll and 12sov that v'the sleeve turns with the tone arm.,l Slotsare formed 1n thetubular portion 8 to allowfthe pins to move withinthe desired yarcofmovementl of the tonearin. To this 4'sleeve 110 'ifsfconnected l'meansofthe pin 11,an arm 13,:whichi1'1 the `form of construction illustrated,consists "of a thin` metal stamping; Thisarm is prol vided Wlth a curvedportion 14 of the same curvature 1- as the sleeve yloand .alsofafylateral pro] ection 15v adapted tofe'ngage another, por-4 tionV ofthesleeve 10 in order to prevent lateral movement ofthe arm 131ielativelyto thel sleeve 10. Verticaly movement of thev arm is"p1 evented by theinwardlyturned projections 16 which engage the' upper edge of thesleevev 10. The outer/end 17 of this yechanism as will beherein'after(described.` The stop v"mechanismf includes Qa `base4 onwhich is arranged a'fmemberrpitotal'ly mounted on the base, 4 at`1`9.'andjc'ar'rying y the movable contact't20 of ai' hfaving 4 a pair of'stationary switch:` ContactV members 2Qfi carried byy a blockofjjinsulation secured to the base 4. A sp'rin'g 21 ten-dsltolt'urn'the` member 18 in 1a manner :to carry the movable- 'switch"contact 2O out ofeng'agement with the stationary Contact membersQO-tobreak l the electric circuit 22 'ofthe propellingIngo-,v`

torf22a suitably geared tothe yturn table,

Vthe switch v'contacts being in engagement Vwith each other as shown inFigure/ 2, for. completing the motor circultfwhereuponthe motor( drivesthe turn table andthe switch contacts being out of 4engagement with each(other, as vshown 'in vFigure 3 to `break` the vmotor l'circuit forcausing tlieturn table 6 to stop. A leverv 37 having a kiiurled` knobl38 is' connectedl to the switclrfcarrying mem b er 18 for movingy thelatter manuallyvr .against *the tension of vthe spr-ing 21. The movableswitch member 2Q after movement by the' Vlever to ,complete themotorcircuit heldin suclrposition bymeans ofgalatch l 23,'the shoulder 24 ofwhich 'engagesa'shoul-f der 25, ofthe contact carrying member' 18.

The latch is operated by means-cfa trigger A The eadgof the; trigger 2e16e-say @gages a s161539 `in' the @ad of the latch 23 so that thetrigger and latch may move slightly independent of each other as aresult of the lost motion connection. The lost motion connection betweenthe trigger 26 and latch 23, though slight, permits the machine to run alittle longer than the normal stop setting would seem to indicate. Inthis way there is no chance for the machine to vstop automatically untilthe record is completely played. Movement ofthe trig-y ger and latchaway from the contact carrying member 18 is limited by a stop 40, asshown in Figure 3.

As stated before, in Figure 2 the various parts are shown in theirrelative positions with the switch contacts 20 and 2Oa in engagementwith each other to complete the motor circuit for driving the turntable, and in Figure 3 parts are in such relative positions that theswitch contacts 20 and 20a are out ofengagement with each other tointerrupt the motor circuit. In this latter position the end of thelatch engages a second projection v27 on the contact carrying member 18,which projections prevent the spring 21 from functioning to causemovement of the member 18 to close the motor circuit. The trigger .26 ispivoted at 28 about which point a lever 29 also turns. The lever 29 isprovided at its outer end with a knurled knob 41 adapted to be engagedby the end 17 of the arm 13 as the latter is moved by the tone armtoward the left, as shown in Figures 2 and 3. The trigger 26 and lever29 are connected frictionally so that their relative positions may beadjusted. For this purpose the trigger is provided withl a right-angleextension 30 carryingat its end a .bolt,31. The lever 29 is alsoprovided with an extension 32 overlying the extension30 and having asegmental slot 33 formed in its end portion. The bolt 31 passes throughthis slot and as the head 34 of this bolt is retracted by a spring 35surrounding the bolt 31, the extensions 30 and 31 are held in frictionalengagement with each other, as will be evident from Figure 1. Thissegmental slot 33 allows of adjustment between the lever 29 and thetrigger 26. The tension of the spring may be varied as desired by meansof the nut 45 on the bolt 31. The trigger 26 is provided with a hookedprojection 36 adapted to engage one end of the spring 21. This springtends to hold the trigger and thereby the latch 23 in engagement withthe contact carrying member 18. It will be observed that the spring 21actuates both the contact carrying member 18 and also the trigger 26 andlatch 23.

1n the operation of the device, the lever 2 9 is rst moved to the left,as viewed in Figures 2 and 3,' an amount such that the tone arm may bemoved to bring the needle into engagement with the last groove orsubstantially the last groove of the record without causing the arm 13to engage the lever 29. The tone arm then is moved to the extent thatthe needle engages with the lastl groove. The lever 29 is then moved tothe right until it engages the arm 13 thereby leaving a. slight spacebetween the trigger 26 and the outer wall of the slot 39 to preventprematurestopping of the machine. As the move ment of the trigger 26 islimited by the stop 4:0 the arm 29 is moved relatively to the trigger toallow the tone arm 5 and arm 13 to move for setting the machine forproper stopping thereof. The tone arm is then moved to bring the'needlein engagement with the groove at the beginning ot the .4

record. n

To start the turn table rotating the lever 37 is moved to the left, asshown in Figures 2 and 3. As soon as the shoulder 25 or" the member 18is moved beyond the shoulder 24: v

of the latch the latter is moved upwardly by the action of the spring 21on the trigger 26 so the movable contact 2O of the' switch is moved intoengagement with the stationary contacts 2Oa to complete the motorcircuit. Thismovement of the latch and trigger causes a slight movementof ythe lever 29 to the right. When the needle has reached the end ofthe record, the end 17 of the arm 13 contacts with the-knob 41 of the'arm 29 and gradually moves the latter and trigger 26 to the lei'twithout imparting any motion to the latch 23 until the safety lostmotion is taken up and then the latch is tripped and the movableelectric contact 20 snappedout of engagement with the stationarycontacts 20a to interrupt the motor circuit thereby causing the turntable to cease rotating. Not only is the circuit of the electric motorinterrupted to stop the rotation of the turn 'f table, but also the turntable is stopped automatically in a manner such that the record will becompletely played before themachine is stopped.

It is apparent that there may be variousV 1 modifications of theinvention herein particularly shown and described, and it is myintention to cover all such modications which do not involve a departurefromv the spirit and scope of the invention as set forth in thefollowing claims.

I claim:

1. In a sound reproducing machine, in combination, a motor for actuatinga record,

a switch in the motor circuit, a latch orxl holding said switch inclosed position, tripping mechanism for operating said latch adjustablewith respect to said latch to time the occurrence of the trippingaction, Vsaid tripping mechanism including two relatively7 movablemembers, one of which members engages said latch, a projection securedto the tone' arm and arranged to engage the other member of saidtripping members under certain conditions,land a spring for actuatingthe tripping` mechanism to open said switch when one member of saidtripping `mechanism is engaged by said projection.

2. yIn a sound reproducing machine, in combination, a motor foractuating a record,

- a switch in the motor circuit, a latch for rmovable members, means forregulating theV v relative movement therebetween, one of said y membersbeing adapted to engage'said latch,

a -projection secured `to thetone arm `and arranged vto engage the othermember of said tripping member under certain conditions, and a springfor-actuating the tripping mechanism to open said switch when one memberof said tripping mechanism is engaged by said projection.

Signed at Chicago, Illinois, this lstday i of October, A. D. 1917.

Witnesses: v

l EDWIN P.v GRUBBY,y

E, R. HICKMAN.

- FOREST CHENEY. i c.

